example on using a gekko indicator with non standard input

example.js

// Within Gekko the easiest way to use indicators is to use the addIndicator interface:

this.addIndicator('myEma', 'EMA', 10);

// However this way you have little control over what data goes into the indicator (always market data)
// If you want to put output of another indicator into your EMA you cannot use this interface and have to
// manually import the indicator that you want to feed other data, for example:

const EMA = require('./indicators/EMA');

const strat = {};

strat.init = () => {
  // use normal RSI
  this.addIndicator('myRSI', 'RSI', 10);

  // create your custom EMA
  this.customEMA = new EMA(10);
}

strat.update = () => {
  // manually put RSI data calculated by Gekko into your own EMA
  this.customEMA.update(this.indicators.myRSI.result);
}

strat.check = () => {
  // check your custom EMA result

  const EMA_of_RSI = this.customEMA.result;

  if(EMA_of_RSI < 1) {
    // your stuff
  }
}